{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T14:42:52Z","timestamp":1760971372630,"version":"build-2065373602"},"reference-count":15,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2004,8,11]],"date-time":"2004-08-11T00:00:00Z","timestamp":1092182400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Magnetic Reson in Chemistry"],"published-print":{"date-parts":[[2004,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>It is demonstrated that long\u2010range <jats:sup><jats:italic>n<\/jats:italic><\/jats:sup><jats:italic>J<\/jats:italic>(<jats:sup>1<\/jats:sup>H,<jats:sup>117<\/jats:sup>Sn) coupling constants down to 0.3 Hz, can be accurately quantified from non\u2010linear fitting of the sine modulation of the associated <jats:sup>1<\/jats:sup>H\uf8ff<jats:sup>117<\/jats:sup>Sn correlation cross\u2010peak intensities sampled as a function of the heteronuclear antiphase coherence preparation time in the <jats:sup>1<\/jats:sup>H\uf8ff<jats:sup>117<\/jats:sup>Sn <jats:italic>J<\/jats:italic>\u2010HMQC pulse sequence. The contribution of additional, undesired modulations is illustrated and assessed using the product operator formalism, and is traced back to contributions that arise from miss\u2010setting of the wandering 180\u00b0 pulse angle in the constant time period. The power of the method and its use in the characterization of weak intramolecular donor\u2013acceptor interactions are illustrated by the determination of long\u2010range <jats:sup><jats:italic>n<\/jats:italic><\/jats:sup><jats:italic>J<\/jats:italic>(<jats:sup>1<\/jats:sup>H,<jats:sup>117<\/jats:sup>Sn) coupling constants of bis[3\u2010(dimethylamino)propyl]tin derivatives, [Me<jats:sub>2<\/jats:sub>N(CH<jats:sub>2<\/jats:sub>)<jats:sub>3<\/jats:sub>]<jats:sub>2<\/jats:sub>SnR<jats:sub>2<\/jats:sub> (<jats:bold>2<\/jats:bold>, R = Me; <jats:bold>3<\/jats:bold>, R = Ph; <jats:bold>4<\/jats:bold>, R = <jats:italic>t<\/jats:italic>\u2010Bu). By comparing these with the values found for the corresponding bis(4\u2010methylpentyl)tin derivatives, [Me<jats:sub>2<\/jats:sub>CH(CH<jats:sub>2<\/jats:sub>)<jats:sub>3<\/jats:sub>]<jats:sub>2<\/jats:sub>SnR<jats:sub>2<\/jats:sub> (<jats:bold>2<\/jats:bold><jats:sup>\u2032<\/jats:sup>, R = Me; <jats:bold>3<\/jats:bold><jats:sup>\u2032<\/jats:sup>, R = Ph), which lack such interactions, the use of long\u2010range coupling constants to detect intramolecular donor\u2013acceptor interactions is evaluated. It is concluded that <jats:sup><jats:italic>n<\/jats:italic><\/jats:sup><jats:italic>J<\/jats:italic>(<jats:sup>1<\/jats:sup>H,<jats:sup>117<\/jats:sup>Sn) couplings up to six bonds through an organic carbon chain can be quantified, whether donor\u2013acceptor interactions are present or not. Furthermore, evidence is presented that, when two scalar coupling pathways co\u2010exist, the pathway involving an intramolecular donor\u2013acceptor interaction can have opposite sign, thus decreasing the overall coupling constant to a value smaller than that actually measured in the absence of a donor\u2013acceptor interaction, where only one coupling pathway is active. There is nevertheless clear numerical value discrimination in the series of compounds investigated between long\u2010range couplings in derivatives without weak intramolecular donor\u2013acceptor interactions and those where such interactions can exist. Copyright \u00a9 2004 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/mrc.1404","type":"journal-article","created":{"date-parts":[[2004,8,11]],"date-time":"2004-08-11T05:01:11Z","timestamp":1092200471000},"page":"776-780","source":"Crossref","is-referenced-by-count":7,"title":["Assessing weak intramolecular donor\u2013acceptor interactions using <sup>1<\/sup>H\uf8ff<sup>117<\/sup>Sn <i>J<\/i>\u2010HMQC spectroscopy"],"prefix":"10.1002","volume":"42","author":[{"given":"Monique","family":"Biesemans","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jos\u00e9 C.","family":"Martins","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Klaus","family":"Jurkschat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicole","family":"Pieper","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stefan","family":"Seemeyer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rudolph","family":"Willem","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2004,8,11]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/om960895h"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0079-6565(00)00019-4"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/0022-2364(86)90395-1"},{"key":"e_1_2_1_5_2","first-page":"45","volume-title":"Advanced Applications of NMR to Organometallic Chemistry","author":"Kayser F","year":"1996"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrc.1260330804"},{"key":"e_1_2_1_7_2","unstructured":"MartinsJC JurkschatK PieperN BiesemansM WillemR. 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